Mercer County Property Taxes
Mercer County, New Jersey
Effective Tax Rate
0.00%
3.4% above state avgMedian Annual Tax
$0
$734/mo escrow
Estimate Your Tax
Annual Tax
$0
Monthly
$0
Eff. Rate
2.51%
At a Glance
Median Home Value
$351,000
State avg ▼ $402,957
Tax w/ Mortgage/yr
$8,934
$745/mo escrow
Tax w/o Mortgage/yr
$8,572
$714/mo
State Tax Rate Rank
#17
of 21 counties (1 = lowest)
Similar tax rates
Data Story
About Property Taxes in Mercer County, New Jersey
Mercer taxes exceed national norm
Mercer County's 2.508% effective tax rate ranks in the top quarter nationally, well above the U.S. median of 2.11%. The median property tax of $8,804 reflects a relatively high rate applied to homes averaging $351,000 in value.
Mercer ranks highest in New Jersey
Mercer County's 2.508% effective tax rate is the highest among all 21 New Jersey counties, significantly exceeding the state average of 2.211%. This distinction marks Mercer as an outlier in Jersey's already high-tax environment.
Mercer taxes dwarf surrounding counties
Mercer's 2.508% rate towers over Hudson (1.851%), Monmouth (1.765%), and Morris (1.796%), making it substantially more expensive for homeowners in this region. Even Hunterdon (2.005%) and Passaic (2.276%) lag behind Mercer's burden.
A $351K home costs $8,804 yearly
The median Mercer County home is valued at $351,000, generating approximately $8,804 in annual property taxes at the county's elevated rate. With mortgage deductions, the cost rises slightly to $8,934.
Mercer homeowners should challenge assessments
Given Mercer's status as New Jersey's highest-taxed county, overassessment is a real concern for many residents. Filing a formal assessment appeal with the county could yield significant savings—the process is free and can address inflated property valuations.
How Mercer County Compares
Median Annual Property Tax
Mercer County
2.51%
Effective rate
New Jersey Avg
2.11%
Effective rate
National Avg
0.91%
Effective rate
Frequently Asked Questions
What is the property tax rate in Mercer County, New Jersey?
How much are property taxes in Mercer County?
How does Mercer County compare to the New Jersey average?
What is the median home value in Mercer County, New Jersey?
Why is Mercer County property tax rate higher than the New Jersey average?
How does Mercer County rank for property taxes in New Jersey?
Counties with Similar Tax Rates
Nearby Counties
Other Counties in New Jersey
Data updated: March 2026
Data from U.S. Census Bureau, American Community Survey 2019-2023 5-Year Estimates. Effective tax rate is calculated as median property tax divided by median home value.